I've mentioned ReactiveCocoa several times here, but I haven't linked to RxSwift before. Rx is a cross platform (kinda) implementation of FRP and of course, there's a Swift implementation of it. Agnes Vasarhelyi looks at the basics as someone who is coming from ReactiveCocoa. There's also a sample app if you want to see it in action. Also published this week and worth a read is Mark Aron Szulyovszky using RxSwift to implement some gesture recognition code.
Soroush Khanlou with an interesting take on iOS architecture. He investigates using lots of view controllers added to a parent, each responsible for a specific piece of behaviour. It's an interesting technique for sure and while it maybe feels a little unnatural in places, I think there's something to the approach.
Although apps on the watch haven't been very exciting, I did have some hope for complications. Unfortunately they too have been a little disappointing, maybe due to the fact that adding a complication to an existing app is a bit tricky. Kristina Thai walks you through the process of adding the additional extension for a complication to your watchOS project.